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EP 3 221 262 A1

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(43) Date of publication: 27.09.2017 Bulletin 2017/39 (21) Application number: 15861794.4 (22) Date of filing: 18.11.2015

(51) International Patent Classification (IPC):  C01B 32/05(2017.01) C01G 3/02(2006.01) C01G 39/02(2006.01) C01G 51/04(2006.01) C01G 55/00(2006.01) C01F 5/02(2006.01) C01G 31/02(2006.01) C01G 49/06(2006.01) C01G 53/04(2006.01) H01G 9/00(2006.01) (86) International application number: PCT/US2015/061400 (87) International publication number: WO 2016/081638 (26.05.2016 Gazette 2016/21)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 18.11.2014 US 201462081237 P (71) Applicant: The Regents of the University of California Oakland, CA 94607 (US)	(72) Inventors: EL-KADY, Maher F. Los Angeles, California 90024 (US) KANER, Richard B. Pacific Palisades, California 90272 (US) HWANG, Jee Youn Seoul, South Korea 05510 (US) (74) Representative: Nederlandsch Octrooibureau  P.O. Box 29720 2502 LS The Hague 2502 LS The Hague (NL)